1. Can you give me the actual source in Rambam writings where he express his opinion that demons do not exist? 2. Is it true that this issue was so contoversial in the Jewish community that his books were burnt by fellow Jews?
Commentary to Mishna Avoda Zara 4, 7. Hilchot Avoda Zara 11; 11, 16. The guide to the perplex 3, 46. It I true that his books were burned sometime in Jewish history by Jews but the reason was not this small issue but it was much more complex than that.